Plumb-level



(No Medef.) C. lVIARSlEhLL.`

PLUMB LEVEL. 1\T0.'377,434. y Patented Peb. 7, 1888.

.WITNESS s A N. Pneus, Mums-1pm. www n.c.

'i .NITED STATES] cALvIN MARSHALL, on ST. JOSEPH, MISSOURI.

Y PLUMB- .LEVEL- o ASPEC'IIS'ICATION forming part of Letters Patent No. 377,434, dated February 7, 1888.

' l Application filed July 5, 1887. Sieria1No.`243,405. (No model.)

To all whom it mag/concern.-

Be it known that I, CALVIN MARSHALL, a citizen of the United States, residing at St. Joseph, inthe county of .Buchanan and Statey of Missouri, have invented certainA new and useful Improvements in Leveling Apparatus;

and I do declare the following Vto be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has relation to improvements `in a combined plumb and level; and the novplumb-bob may be used in combination with a level in'such a manner that the said'plumbbob and level will not interfere with or disturb the operation/of each other, and, further,

that they are adapted to be inclosed or covered and defended'from wind, Src., thus rendering the device `true and accurate.

In the accompanying drawings, Figure 1 is a front elevation of my device. Fig. 2 is a rear elevation of the same.A Fig. 3 is a verti- Y cal longitudinal sectional view, taken on the line x x of Fig. l; and Fig. t is a transverse sectional view on the line g/ y, Fig. -3.

Referring to the drawings by letter, A designates the box creasing of an ordinary level, constructed in the usual well-known manner and provided at its upper end and in the front face thereof with an attaching or fastening plate, B, said plate being ypreferablycountersunk to provide a Hush or smooth surface.

C is a glass plate secured on the front face of the casing, at the lower 'end thereof, and is also countersunk, as shown at a," Fig. 3.

D designates a vertical longitudinal groove or channel that is provided or formed in the middle of the box or casing, and extends from the bottom of the plate B to within ya short distance of the lower end of the casing,where itcommunicates vwith an egg-shaped open-v ing, D. I

E designates a cord or wire that is suspended yin the groove D by means of the plate or fastening device B, and to the lower end of this cord or wire I attach aplumb-bob, d, which is y adapted to swing in the egg-shaped openingformed in the lower end of the box creasing A, as clearly shown in Fig. 3 of the drawings. It will be observed that I provide a glass plate, o', in the rear face of the box A, similar Y and directly opposite to the plate C, before described. It will then be understood that the egg-shaped opening D is closed-both upon itsv front and rear faces bythe said plates C C',

by which construction the working of the plumb-bob is rendered visible fromxthe outside to the eye. J F F designate strips or blocks of the same size and shape, which are adapted to lit snugly inthe open front face of the groove 'or chan nel D. Y As will be observed by the drawings, the upper strip, F,is constructed of wood or other suitable impenetrable material, while the'` lower strip,'F,is madeof glass, for the same purpose of rendering the plumb-cord visible, as the oppositcly-disposed plates() C;

perform'the same function for the plumb-bob d.

Aline may be drawn down the middle of the longitudinal groove or channel D and parallel tothe side edges of the box or casing A, thesaid line being adapted to be' used in f the same manner-and for a similar purpose as in an ordinary plumb or spirit-level.

The' heretoforementioned parts constitute, Vthe plumbing apparatus 'of my invention.

I willnow proceed to dscribethe leveling device of my invention.

G is a-plate, preferably of metal, that lisse` curedby screws in any/suitable manner to Yone side of thebox orvcasing A, midway the lengthv vided Aon its under surface with a perforated lug orfproje'ction, g, which extends for a slight distance in a short groove or channel, VH. This thereof, and countersunk. This plate is prof groove or channel communicates with an'e'ggl shaped opening, I, corresponding to the opening D, hereinbefore described, and which also `has its front and rear faces inclosed by the glass platesJ J.

K indicates a cord or at its upper end to the projection 'or lug g, and having the plumb-bobhattached to its lower end and suspended in the egg-shaped opening I, as shown in Fig. 4.

L designates a partition or plate of glass that lwire that is secured is secured to one of the'walls of the groove or channel H, to prevent the striking of the cord E against the cord or wire K, and also to make the crossing ofthe cords visible from the outside through the plates .I J of the casing.

M is a guidefplate that is secured to the partitition L, and perforated, as at m, to allow for the passage of the cord or wire E, as shown.

It will be seen that the two strips or blocks F F', hereinbefore described, are connected at their meeting ends to each side of the eggshaped opening I and joined by the glass plate J.

Having described my inventiomwhat I claim as new, and desire to secure by Letters Patent, 1s-

1. A spirit-level casing having channels arranged lengthwise and crosswise, as described, and a transparent division arranged at the intersection thereof and provided with a guide for; one ot the bob-cords, substantially as speciiie 2. As an improved article of manufacture, a leveling and plumbing device comprising a case having a transverse and longitudinal groove, bobs suspended from cords in the respective grooves, and transparent face-plates for the chambers containing the bobs, Vsubstantially as specied.

3. A plumb-bob and leveling device having the case grooved and recessed, as described, the glass piece E, secured in the said recess,and the glass plates C and C and J and J,whereby bobs placed in the case may be viewed from either side, substantially as specified.

In testimony whereof I affix my signature in presence of two witnesses.

A CALVIN MARSHALL.

Witnesses:

GEO. W. HINToN, Jos. LANGDON. 

